手拉手CentOS 安装 mysql-5.7

MySQL是一种关系型数据库管理系统，关系数据库将数据保存在不同的表中，而不是将所有数据放在一个大仓库内，这样就增加了速度并提高了灵活性。

tar.gz包安装

#如没有安装wget则无法使用，以装，则直接省略该步~！

yum -y install wget

直接从官方下载#~耐心等待即可~-~-~

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz

解压

tar xzvf mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz
ls

mv mysql-5.7.24-linux-glibc2.12-x86_64 /usr/local/mysql      #移动该文件到/usr/local/下，并将文件夹名称修改为mysql
mkdir /usr/local/mysql/data                              #在/usr/local/mysql目录下创建data目录
cd

创建mysql用户组和用户

cat /etc/group | grep mysql
cat /etc/passwd |grep mysql
groupadd mysql
useradd -r -g mysql mysql

更改mysql目录下所有的目录及文件夹所属的用户组和用户，以及权限

chown -R mysql:mysql /usr/local/mysqlchmod -R 755 /usr/local/mysql

检查该链接库文件有没有安装使用

rpm -qa|grep libaio
yum install libaio-devel.x86_64

yum -y install numactl

编译安装并初始化mysql,务必记住初始化输出日志末尾的密码~~红框为数据库管理员登入临时密码!!!

cd /usr/local/mysql/bin
./mysqld --initialize --user=mysql --datadir=/usr/local/mysql/data --basedir=/usr/local/mysql

vi /etc/my.cnf[mysqld]
datadir=/usr/local/mysql/data
port=3306
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
symbolic-links=0
max_connections=600
innodb_file_per_table=1
lower_case_table_names=1
character_set_server=utf8

/usr/local/mysql/support-files/mysql.server start

ps -ef|grep mysql | grep -v grep
ps -ef|grep mysqld | grep -v grep

添加软连接，并重启mysql服务

ln -s /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqlln -s /usr/local/mysql/bin/mysql /usr/bin/mysqlservice mysql restart

输入临时密码

mysql -u root -p

#修改密码
set password for root@localhost = password('自定义');
#开放远程连接
use mysql;
update user set user.Host='%' where user.User='root';
flush privileges;
quit

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld  #将服务文件拷贝到init.d下，并重命名为mysqlchmod +x /etc/init.d/mysqld  #赋予可执行权限chkconfig --add mysqld  #添加服务chkconfig --list  ##显示服务列表

yum安装mysql

下载并安装MySQL官方的 Yum Repository

wget http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

安装MySQL

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

yum -y install mysql mysql-server mysql-devel

systemctl start mysqld.service

systemctl status mysqld.service

查看日志文件中找出随机密码

grep "password" /var/log/mysqld.log

修改密码

ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

开发远程访问

grant all privileges on *.* to 'root'@'%' identified by ' 123456' with grant option;

flush privileges;

exit;

vi /etc/my.cnf，添加下面的内容，支持弱口令密码

character_set_server=utf8

init_connect='SET NAMES utf8'

#添加validate_password_policy配置

validate_password_policy=0

#关闭密码策略

validate_password = off

显示字符编码

show variables like '%character%';

显示密码策略

show variables like '%password%';

连接mysql可能会遇到的问题

Navicat Premium 12远程报错及处理方法

报错- lost connection to mysql server at 'reading initial communication packet',system error:0

vim /etc/my.cnf 中的[mysqld]下添加skip-name-resolve

#报错1698 Access denied for user *@*

mysql -u root -p
#进行远程连接授权
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
GRANT ALL PRIVILEGES ON *.* TO 'zabbix'@'%' WITH GRANT OPTION;
flush privileges;
use zabbix;
GRANT ALL PRIVILEGES ON *.* TO 'zabbix'@'%'IDENTIFIED BY '111111' WITH GRANT OPTION;
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'IDENTIFIED BY '111111' WITH GRANT OPTION;
flush privileges;